Federal prosecutors have obtained a 2021 audio recording of former President Donald Trump admitting he kept a classified Pentagon document about a possible attack on Iran after he left office, multiple sources said. CNNReuters reports.

Trump’s comments on the tape suggest he would like to share the information but is aware of the limitations on his post-presidency ability to declassify information, two sources said.

CNN noted that while it had not listened to the tape, several sources described it, with one source saying the relevant part about the Iran document was two minutes long. Another source said the discussion was just a small part of some longer meetings.

Special counsel Jack Smith, who is leading the Justice Department’s investigation into Trump, focused on the meeting as part of a criminal investigation into Trump’s use of national security secrets.

Prosecutors questioned witnesses about the recording and the document before a federal grand jury.

The episode sparked enough interest for investigators to question General Mark Milley, one of the top national security officials in the Trump era, about the incident.

Last weekend, The Washington Post reported that prosecutors had gathered evidence that Trump sometimes kept classified documents in his office where they were visible and sometimes showed them to others.

Two of Donald Trump’s staffers also moved boxes of documents a day before FBI agents and a prosecutor visited the former president’s Florida home in early June 2022 to retrieve classified documents after a subpoena.

Trump and his aides also allegedly held a “dress rehearsal” for moving classified documents before his office received the subpoena in May 2022.